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    <h1>Mozilla</h1>
    <img src="img/huohu.png" alt="我的测试页面">
    <p>Mozilla 是一个全球社区，这里聚集着来自五湖四海的</p>
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  <li>技术人员</li>
  <li>思考者</li>
  <li>建造者</li>
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<p>我们致力于……</p>
<button>切换用户</button>
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